Pure Encapsulations Melatonin 20 mg. promotes healthy angiogenesis balance, immune function and antioxidant activity. Melatonin is primarily associated with supporting the body's natural sleep cycle, however recent scientific advances suggest that it may play a role in cellular health. More than a dozen preliminary clinical trials have examined the role of melatonin in supporting healthy cells and tissues, in part by maintaining healthy angiogenesis balance, promoting immune cell activity, and scavenging free radicals. Randomized studies have revealed the potential for melatonin to positively support colon, breast, prostate and lung tissues. Melatonin 20 mg. provides high capacity cellular support for tissues, including the colon, breast, prostate and lungs.